Lexus Pre-Collision System Malfunction or Unavailable. ADAS Calibration From $300 Per System.
Is your Lexus showing "Pre-Collision System Unavailable" or "System Malfunction Visit Your Dealer", maybe since new glass or body work? We find what's blocking the camera or radar, and re-aim one that has moved, for Lexus owners nationwide. Send the VIN and the exact words.
- Your quote is confirmed in writing before anything is scheduled.
- Calibration runs to full manufacturer specification.
- A calibration certificate after the job.
Is my Lexus safe to drive with this warning?
Yes, with care. Until it clears, don't count on the car to warn you or brake for you.
- "Unavailable" or "System Stopped": a pause that ends once the sensors can see, or after a drive.
- "System Malfunction Visit Your Dealer", or a warning that won't clear: have it inspected right away.
- Stability control off: the warning sounds, but the car won't brake.
Sources: Lexus Safety System+ 2.0 guide, 2019 and 2020 models; Lexus owner's manual, 2023 RX.
What stops a Lexus pre-collision system working
On a Lexus, a pre-collision "Malfunction" message means a fault, not a dirty sensor. Have it inspected before relying on it.
The PCS (pre-collision system) light comes on or flashes, with a message, when the system shuts itself off.
Look for something blinding or tilting the windshield camera, or the radar behind the front emblem:
- Dirt, snow, ice or fog on the windshield or the emblem.
- A sticker, tint or crack in front of the camera, or a broken emblem.
- A lift kit, lowered suspension or a heavy load that tilts the car.
- New glass, grille or bumper work, or an alignment. Then the camera or radar needs calibration: re-aiming it to see the road straight.
Before you book, try this
Start here. Had glass or body work done? Skip to the prices below.
- Clean the top of the windshield and the Lexus emblem on the grille.
- Check stability control is on.
- Switched the system off? Turn it back on in the settings on the display.
- Battery replaced or disconnected? Drive a while before you judge.
- Still on after a drive, or it says Malfunction? Then book a check.
Sources: Lexus Safety System+ guide, 2022 models; Lexus Safety System+ 2.0 guide, 2019 and 2020 models.
Lexus camera and radar prices
Cleaning costs nothing. New glass adds the camera line. A grille, bumper or alignment job adds the radar line.
Calibration, per system
Diagnostic scan
- Same price on a mobile visit, except rows marked Shop bay only.
- Prices are before sales tax. Whether labor is taxed depends on your state; any tax that applies is itemized on your written quote.
- Dynamic calibration runs on the road, so it can be done as a mobile visit. Static calibration needs a level, lit, measured space, so whether your job can be done mobile depends on what your car's documented procedure calls for.
- Rows marked Shop bay only are done in a shop bay. The bay-and-road camera price applies when your car needs both calibrations.
What your Lexus shows, by model year
2019 RX
- What the dash shows:
- "Forward Camera System Unavailable Clean Windshield"
- What to do:
- Clean the glass by the camera. Still on? Book a check.
2019 ES; 2020 NX and GX
- What the dash shows:
- "Front Camera Unavailable"
- What to do:
- Braking help may pause too. Clean and defog the windshield.
2021 IS; 2022 LX and UX
- What the dash shows:
- "Pre-Collision System Unavailable" (IS and LX add "See Owner's Manual")
- What to do:
- Paused. Clean the glass and emblem.
2022 NX; 2023 RX and RZ; 2024 GX
- What the dash shows:
- "System Stopped Front Radar Sensor Blocked Clean Radar Sensor" (2023 RX) and other "System Stopped" messages; "System Malfunction Visit Your Dealer"
- What to do:
- Stopped: clean what it names. Malfunction: inspection now. Lexus System Stopped messages, decoded.
From Lexus owner's manuals, 2019 to 2024. Your model isn't here? Send us the exact words.
Your warning, page by page
Not sure which warning you have? Pick your match, or send us the words and we'll quote the fix.
The same message on a Toyota
-
Pre-Collision System Malfunction
Toyota's page decodes that exact line. Lexus manuals we checked, 2019 to 2024, word it differently.
Related warnings
-
Forward collision warning light
Seeing a symbol, not words? Match it by make.
-
Front radar sensor blocked
Cleaned the emblem and the warning came back? Here's what to check next.
-
Adaptive cruise control unavailable
Lost radar cruise too? The same radar runs it.
Know your Lexus pre-collision system
The wording depends on your model year. Here's what pauses the system, what blinds it and which jobs need a calibration.
Safety System+ is the Lexus camera and radar set. Older models name the camera in messages, later ones the system.
On the 2022 NX, the 2023 RX and RZ, and the 2024 GX, most messages start "System Stopped". Our Lexus decoder explains the common ones.
No Lexus manual we read, 2019 to 2024, prints "Pre-Collision System Malfunction". That wording is covered on our Toyota pre-collision page.
Not listed, like a 2020 to 2022 RX or an LS 460? Treat "Unavailable" as a pause, then send the exact words.
Sources: Lexus owner's manuals, 2019 to 2024 models; Lexus Safety System+ guide, 2023 models.
Some pauses are built in. Lexus's 2.0 guide, for 2019 and 2020 models, lists these:
- In reverse, the system doesn't work.
- After a battery terminal is reconnected, it stays off until the car has been driven for "a certain amount of time".
- With stability control off, only the warning works.
- With four-wheel-drive low range (the L4 light) on, only the warning works.
Switched it off yourself? Many Lexus models turn it back on at the next restart. If not, use the display settings.
Sources: Lexus Safety System+ 2.0 guide, 2019 and 2020 models; Lexus Safety System+ guide, 2022 models.
The camera looks through the top of the windshield. The radar looks through the front emblem.
Either can be blinded by:
- a fogged, dirty, cracked or tinted windshield
- rain, snow, ice or a sticker on the glass
- a broken, dirty or film-covered emblem
- heavy rain, fog or strong light from the front
Ride height counts too. A lift kit, lowering, towing or a heavy load changes the angle they read.
Sources: Lexus Safety System+ 2.0 guide, 2019 and 2020 models; Lexus Safety System+ guide, 2023 models.
These jobs move what the camera or radar sees. Each one calls for a calibration:
- New windshield: the camera. Windshield camera calibration, $300.
- The radar, grille or front bumper removed, refitted or replaced: the radar. Front radar calibration, $330.
- Wheel alignment: the radar at least, plus any step your car's procedure names. See calibration after a wheel alignment.
- A hard knock up front: an inspection, even with no new parts.
Each sensor the job touched gets its own quote line. More on calibration after collision repair and windshield replacement.
Sources: Lexus owner's manuals, 2023 RX and 2021 IS; Toyota Collision Pros, Zero Point Calibration, 2018.
Lexus pre-collision warning: your questions
PCS is the pre-collision system. Its light comes on or flashes, with a message, when the system pauses or shuts itself off.
Read the message first. It may be dirt, snow or fog on the windshield top or the front emblem. Clean both and drive.
The light also stays on while you have the system or stability control switched off.
A light that stays on or keeps flashing after that needs a check. Book one and tell us what the message says.
No button resets it. A paused system comes back by itself once the windshield and emblem are clear. Clean both, then drive.
Switched it off? On many Lexus models, a restart turns it back on. If not, use the settings on the display.
After a battery job, drive a while before you judge.
If it comes back after every clean, something needs fixing. Send us the exact words with your VIN.
No. A camera or radar that lost its aim needs re-aiming, and we do that nationwide, to Lexus's documented procedure.
Your job may need one sensor or both. Front camera calibration is $300 and front radar calibration is $330 at a service center.
Prices are per system, before sales tax where your state charges it on labor, and the full rate card is on the pricing page.
If a part has failed, a scan finds it first. A diagnostic scan, when your job needs one, is priced and itemized separately.
A replaced camera or radar on a newer Lexus may need factory software too. Your quote says who does that step.
Still under the Lexus warranty? Then call the dealer first.
Not necessarily. The camera reads the road through that glass, so new glass means a re-aim. Ask the glass shop if they did it.
Tint on the new glass can blind the camera too.
If the re-aim wasn't done, book a windshield camera calibration. It's $300 at a service center.
A calibration fixes aim. It can't fix a damaged part, which after a collision is usually one of these:
- a bent camera or radar mount
- damaged wiring or a loose plug near the repair
- a failed camera or radar
A scan finds which. A diagnostic scan, when your job needs one, is priced and itemized separately.
Check your policy first. If a glass or collision claim paid for the work, the adjuster can say whether calibration sits inside it.
Your quote prices each sensor on its own line. That makes it simple to send on to the adjuster.
Lexus warning back after cleaning? Send the VIN
Send your dash's words and any recent glass, body or battery job. Your quote is confirmed in writing before anything is scheduled.
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